Service Mode Adjustments - Sanyo CP29EF1 Service Manual

Service Mode Adjustments

Items 187 - 191 GREY SCALE
(1) Receive a monochrome circular pattern.
(2) Set the brightness and colour to normal, contrast to maximum.
(3) Enter to the service mode.
(4) Select No. 188 CUT OFF (R), No, 189 CUT OFF (G), and No. 190 CUT OFF (B) and set each data to 0 by pressing
the VOLUME + or - key.
(5) Select No. 187 WHITE BALANCE (R-Drive and B-Drive) and set data to 3F by pressing the VOLUME + or - key.
(6) Turn Screen Control on the FBT (T471) to minimum (fully counter-clock-wise).
(7) Select No. 191 (1-line appear).
(8) Advance Screen Control clockwise to obtain just visible one colour line. If line does not appear, place this control to
maximum (fully clockwise).
(9) Raise each CUT OFF Level with 1, 2, 3, 4, 5 and 6 keys to obtain just visible white line.
(10) Select No. 187 WHITE BALANCE (Drive Adjustments).
(11) Adjust Red and Blue Drive Levels alternately with 1, 3, 4 or 6 key to produce normal black and white
picture in highlight areas.
(12) Check for proper grayscale at all brightness levels. To turn off the TV Service Menu display, press the MENU key.
Note: If the Grayscale adjustment is made after picture tube replacement, check the High Voltage
G-CUT OFF +
R-CUT OFF +
R-Drive +
R-CUT OFF -
R-Drive -
G-CUT OFF -
TV/AV
TIMER
x
3
2
1
5 6
4
8 9
7
-/-- P P
0
SWAP CH
CH SCAN
MENU
.
PICTURE
A B CH
SOUND S. SYS
BASS
SURROUND
JXPSG
B-CUT OFF +
B-Drive +
B-CUT OFF -
B-Drive -
Press the MENU button to exit
from service mode.
-15-
MAIN BOARD
SCREEN VR
(Under side)